The cardiovascular, or circulatory, system is the body’s blood transport network. Blood delivers oxygen and nutrients to cells so they can convert them into energy. Then it carries away waste products created by this energy-making process.
Together, the heart, blood, and an intricate network of hollow tubes called blood vessels make up the circulatory system. The heart beats constantly to pump blood through the vessels to every part of the body.
Many diseases affect the circulatory system. This includes cardiovascular disease, affecting the cardiovascular system, and lymphatic disease affecting the lymphatic system. Cardiologists are medical professionals which specialise in the heart, and cardiothoracic surgeons specialise in operating on the heart and its surrounding areas. Vascular surgeons focus on other parts of the circulatory system.
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